Tham khảo Fairchild_AT-21_Gunner

Ghi chú
  1. Eden and Moeng, 2002, p. 641.
  2. Swanborough and Bowers, 1976, p. 257.
Tài liệu
  • Andrade, John M. U.S. Military Aircraft Designations and Serials since 1909. Hinckley, England: Midland Counties Publications, 1979, ISBN 0-904597-22-9.
  • Eden, Paul and Soph Moeng, eds. The Complete Encyclopedia of World Aircraft. London: Amber Books Ltd., 2002. ISBN 0-7607-3432-1.
  • Mondey, David. American Aircraft of World War II (Hamlyn Concise Guide). London: Bounty Books, 2006. ISBN 978-0-7537-1461-4.
  • Swanborough, F.G. and Peter M. Bowers. United States Military Aircraft Since 1909. New York: Putnam, 1964. ISBN 0-85177-816-X.
  • Taylor, Michael J.H. Jane's Encyclopedia of Aviation Vol. 3. London: Studio Editions, 1989. ISBN 0-517-10316-8.